TC4钛合金切削中切屑塑性变形分析

摘要

The relationship between the forming process of serrated chip and the cutting force in the cutting process of titanium alloy TC4 was studied,and the micro plastic deformation zone in the formation of serrated chip was analyzed.The experimental results indicate that the chip is changed from strip chip to serrated chip while the cutting speed is more than 48.75 m/min.The serrated chip formation process leads to the fluctuation of cutting force in the cutting process.The variation of cutting force is consistent with the variation of serrated chip.The width of the plastic deformation zone decreases with the increase of the cutting speed.%对TC4钛合金切削过程中锯齿形切屑形成过程和切削力的关系进行了实验研究,并对锯齿形切屑形成中微观塑性变形区进行了分析.结果表明:当切削速度大于48.75 m/rmin时,切屑由带状转变为锯齿形.锯齿形切屑的形成导致了切削过程中切削力的波动变化,切削力与切屑的锯齿形变化规律一致,锯齿形切屑形成中塑性变形区的宽度随切削速度的增加而减小.